Well this is random/crackpot. But for some reason I've been seeing references to the Hollow Earth theory pop up more often on various sites (unrelated to ASOIAF) and it got me thinking. What if GRRMth is hollow? GRRMth being the planet on which our beloved story takes place. The Hollow Earth Theory supposed that Earth has these sort of parabolic openings at the poles, and a sort of internal "sun" as a source of light and heat, and several tunnel systems from other points on Earth